He seems to have nothing to do. He always keeps his hands in his ______.
.Children are not recommended to see such films___________bad for their mental development.
Because of Einstein’s Theory of Relativity, scientists never again regarded the world___________.
--- Hurry up. The bus is coming. --- Oh, no. We mustn’t cross the street___________the traffic lights are green.
Sorry, you lost your purse; I hope it will___________some day.
A brilliant idea occurred to him, ___________to his research in the lab.